Packing box



FIG. 1 is a perspective view of an embodiment of a packing box showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view of another embodiment of a packing box showing my new design;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a left view thereof;

FIG. 12 is a light view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof. 

CLAIM The ornamental design for a packing box, as shown and described. 